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Thread: PyQt5 QTextEdit limiting buffer

  1. #1
    Join Date
    Nov 2015
    Qt products
    MacOS X

    Default PyQt5 QTextEdit limiting buffer

    Is it possible to use PyQt5 to limit the number of lines in QTextEdit? I read about setMaximumBlockCount but can't seem to figure out how to actually use it on QTextEdit. Would anyone have an example they could give me? Here's a sample code I would like to use to do something like that...

    Qt Code:
    1. import sys
    2. from PyQt5.QtWidgets import (QMainWindow, QTextEdit, QApplication, QLineEdit,
    4. class Example(QMainWindow):
    5. def __init__(self):
    6. super().__init__()
    7. self.ex_frame = QFrame(self)
    8. self.ex_frame.setObjectName("ex_frame")
    10. self.ex_out = QTextEdit(self.ex_frame)
    11. self.ex_out.setReadOnly(True)
    12. self.ex_out.setObjectName("ex_out")
    13. self.ex_in = QLineEdit(self.ex_frame)
    14. self.ex_in.setFocus(True)
    15. self.ex_in.setObjectName("ex_in")
    16. self.ex_in.returnPressed.connect(self.execute_command)
    17. vbox = QVBoxLayout(self.ex_frame)
    18. vbox.addWidget(self.ex_out)
    19. vbox.addWidget(self.ex_in)
    20. self.setCentralWidget(self.ex_frame)
    22. self.setGeometry(300, 300, 720, 480)
    23. self.setWindowTitle('Example')
    26. def execute_command(self):
    27. self.ex_out.append(self.ex_in.text())
    28. self.ex_in.setText('')
    30. if __name__ == '__main__':
    31. app = QApplication(sys.argv)
    32. Ex = Example()
    33. sys.exit(app.exec_())
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    Any help would be appreciated. Thanks.

  2. #2
    Join Date
    Nov 2015
    Qt products
    MacOS X

    Default Re: PyQt5 QTextEdit limiting buffer

    The workaround I have in the meantime is to get the html into a string (since I do use the limited html) and do operations on the string. The problem with that is that I can't cut from anywhere when html is involved.

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